Drill-steel retainer



DRILL STEEL RETAINER Filed Aug. 5, 1926 51 27 I III 31 33 r36 3% lfll-afi 1 7 so i 26 Mg 36 v a an 3 t Patented Oct. 30, 1928.

UNITED STATES PATENT OFFICE.

ARTHUR H. SKAER, 01 DENVER, COLORADO, ASSIGNOR,'BY MESNE ASSIGNMENTS, TOTHE GARDNER-DENVER COMPANY, OF QUINCY, ILLINOIS, A CORPORATION OF DELAWARE.

' DRILL-STEEL RETAINER.

Application filed August 5, 1926.

The present invention has for its object the provision of a simple andeffective means carried by a rotatable chuck for retaining a drill steelin the chuck, said means by reason of its rotation with the chuck beingthus relieved from a material amount of wear.

In the accompanying drawings Figure 1 is a side elevation of anembodiment of the invention with the retainer in its operative position,

Figure 2 is an end view thereof,-

Figure 3 is a longitudinal sectional view of the structure of Figures 1and 2, but showing the retainer in its inoperative position,

Figure 4 is an end elevation of the mechanism as shown in Figure 3.

As shown, the drilling motor is designated 26. and the chuck 27. hischuck is rotatable in the barrel or cylinder of the motor by anysuitable means. For example, the piston 26 may have a rifle connection26 with the chuck, so that the two will rotate, the piston in turn beingrotated by any means well known in this art. The chuck, as shown,projects from the motor 26, and has an annular groove 28 in itsprojecting portion. In this groove 28 is rotatably engaged a collar 29having a pivot and tie bolt 30, on which is pivotally mounted a link 31.The link 31 is engaged with the larger end of a retaining link or loop32, which consists of angularly disposed portions 33 and 34. The

portion 33 has its internal space 35 sufli-' ciently large to permit thepassage therethrough not only of the drill steel, as 36, but also of theusual collar 37 of said drill steel. The portion 34 of the retaininglink has the space 35 therein of sufficient area to permit the passageof the steel 36, but is too small to permit the passage of the collar37, which will thus abut against said portion 34.

lVith this arrangement, it will be evident that it the drill is held invertical position, the smaller portion 34 will ordinarily hang down inthe position illustrated in Figures 1 and 2, but the link can be movedto the po sition shown in Figures 3 and 4, so as to permittheintroduction and removal of the Serial No. 127,409.

steel. When in the position illustrated in Figures 1 and 2, the steel ispermitted to have a certain amount of longitudinal movement, but itcannot become detached from the chuck 27, as the collar 37 will strikeagainst the portion 34 of the link. Inasmuch as in the structure shown,the chuck and steel are caused to rotate together, the mounting of thecollar 29 on the chuck will insure that it, and consequently the steelretainer, will ro tate with the chuck, so that there will not bematerial wear between the parts.

From the foregoing, it is thought that the construction, operation andmany advantages of the herein described invention will be apparent tothose skilled in the art, without further description, and it will beunder stood that various changes in the size, shape, proportion andminor details of construction may be resorted to without departing fromthe spirit or sacrificing any of the advantages of the invention.

What I claim, is:

1. The combination with a drilling motor and a steel holding chuckrotatably mounted therein, of a steel retainer rotatably mounted on thechuck.

2. The combination with a drilling motor, of a steel holding chuckrotatably mounted therein and having a portion projecting therefrom, anda steel retainer movably mounted on the projecting portion ofthe chuck.

3. The combination with a drill operating motor,of a steel holding chuckrotatably mounted therein and having a portion projecting therefrom, acollar rotatably mounted on the projecting end of the chuck, a steelretaining loop having its internal space sufliciently large to permitthe passage of a drill steel therethrough, a portion of such space bemgless than the diameter of the drill steel collar and a portion greaterthan said collar, and a link connection between the loop and the collarthat is mounted on the chuck.

In testimony whereof, I aflix my signature.

ARTHUR H. SKAER.

